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| author | Gordon Henriksen <gordonhenriksen@mac.com> | 2007-10-25 08:58:56 +0000 |
|---|---|---|
| committer | Gordon Henriksen <gordonhenriksen@mac.com> | 2007-10-25 08:58:56 +0000 |
| commit | bd412217f222cff0e2d444df5be382f2f048caf1 (patch) | |
| tree | ac05e3536abe8d1306302050edeea5a3dd108ee0 /docs/Passes.html | |
| parent | 9c2c703d0038302edf8244998134402404c3a630 (diff) | |
| download | external_llvm-bd412217f222cff0e2d444df5be382f2f048caf1.zip external_llvm-bd412217f222cff0e2d444df5be382f2f048caf1.tar.gz external_llvm-bd412217f222cff0e2d444df5be382f2f048caf1.tar.bz2 | |
Passes.html now 'passes' validation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43335 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'docs/Passes.html')
| -rw-r--r-- | docs/Passes.html | 40 |
1 files changed, 21 insertions, 19 deletions
diff --git a/docs/Passes.html b/docs/Passes.html index 66ef44b..efa69fe 100644 --- a/docs/Passes.html +++ b/docs/Passes.html @@ -4,6 +4,7 @@ <head> <title>LLVM's Analysis and Transform Passes</title> <link rel="stylesheet" href="llvm.css" type="text/css"> + <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> </head> <body> @@ -20,7 +21,7 @@ while (<HTML>) { m:^<tr><td><a href="#(.*)">-.*</a></td><td>.*</td></tr>$: or next; $order{$1} = sprintf("%03d", 1 + int %order); } -open HELP, "../Release/bin/opt --help|" or die "open: opt --help: $!\n"; +open HELP, "../Release/bin/opt -help|" or die "open: opt -help: $!\n"; while (<HELP>) { m:^ -([^ ]+) +- (.*)$: or next; my $o = $order{$1}; @@ -66,8 +67,8 @@ EOT </div> <div class="doc_text" > <table> -<tr><th colspan="3"><b>ANALYSIS PASSES</b></th></tr> -<tr><th>Option</th><th>Name</th><th>Directory</th></tr> +<tr><th colspan="2"><b>ANALYSIS PASSES</b></th></tr> +<tr><th>Option</th><th>Name</th></tr> <tr><td><a href="#aa-eval">-aa-eval</a></td><td>Exhaustive Alias Analysis Precision Evaluator</td></tr> <tr><td><a href="#anders-aa">-anders-aa</a></td><td>Andersen's Interprocedural Alias Analysis</td></tr> <tr><td><a href="#basicaa">-basicaa</a></td><td>Basic Alias Analysis (default AA impl)</td></tr> @@ -105,8 +106,8 @@ EOT <tr><td><a href="#targetdata">-targetdata</a></td><td>Target Data Layout</td></tr> -<tr><th colspan="3"><b>TRANSFORM PASSES</b></th></tr> -<tr><th>Option</th><th>Name</th><th>Directory</th></tr> +<tr><th colspan="2"><b>TRANSFORM PASSES</b></th></tr> +<tr><th>Option</th><th>Name</th></tr> <tr><td><a href="#adce">-adce</a></td><td>Aggressive Dead Code Elimination</td></tr> <tr><td><a href="#argpromotion">-argpromotion</a></td><td>Promote 'by reference' arguments to scalars</td></tr> <tr><td><a href="#block-placement">-block-placement</a></td><td>Profile Guided Basic Block Placement</td></tr> @@ -169,8 +170,8 @@ EOT <tr><td><a href="#tailduplicate">-tailduplicate</a></td><td>Tail Duplication</td></tr> -<tr><th colspan="3"><b>UTILITY PASSES</b></th></tr> -<tr><th>Option</th><th>Name</th><th>Directory</th></tr> +<tr><th colspan="2"><b>UTILITY PASSES</b></th></tr> +<tr><th>Option</th><th>Name</th></tr> <tr><td><a href="#deadarghaX0r">-deadarghaX0r</a></td><td>Dead Argument Hacking (BUGPOINT USE ONLY; DO NOT USE)</td></tr> <tr><td><a href="#extract-blocks">-extract-blocks</a></td><td>Extract Basic Blocks From Module (for bugpoint use)</td></tr> <tr><td><a href="#emitbitcode">-emitbitcode</a></td><td>Bitcode Writer</td></tr> @@ -529,15 +530,16 @@ EOT <p>Correlated Expression Elimination propagates information from conditional branches to blocks dominated by destinations of the branch. It propagates information from the condition check itself into the body of the branch, - allowing transformations like these for example: - <pre> - if (i == 7) - ... 4*i; // constant propagation + allowing transformations like these for example:</p> + +<blockquote><pre> +if (i == 7) + ... 4*i; // constant propagation - M = i+1; N = j+1; - if (i == j) - X = M-N; // = M-M == 0; - </pre></p> +M = i+1; N = j+1; +if (i == j) + X = M-N; // = M-M == 0; +</pre></blockquote> <p>This is called Correlated Expression Elimination because we eliminate or simplify expressions that are correlated with the direction of a branch. In @@ -569,10 +571,10 @@ EOT <div class="doc_text"> <p>This file implements constant propagation and merging. It looks for instructions involving only constant operands and replaces them with a - constant value instead of an instruction. For example: - <pre>add i32 1, 2</pre><br/> - becomes - <pre>i32 3</pre></p> + constant value instead of an instruction. For example:</p> + <blockquote><pre>add i32 1, 2</pre></blockquote> + <p>becomes</p> + <blockquote><pre>i32 3</pre></blockquote> <p>NOTE: this pass has a habit of making definitions be dead. It is a good idea to to run a <a href="#die">DIE</a> (Dead Instruction Elimination) pass sometime after running this pass.</p> |